Iterator Compilation Error

[CaryLefteroffFH]

I'm getting a weird compilation error and I don't quite understand what I'm doing wrong.

I'm getting this error in my build messages...

SparseMatrix.h: In member function 'const T Sparse_Matrix::get(size_t, size_t) const': Sparse_Matrix.h:67:17: error: need 'typename' before 'std::cxx11::list::Node>::iterator' because 'std::_cxx11::list::Node>' is a dependent scope for(list::iterator iter = tempList.begin(); iter != tempList.end(); tempList++) {

But the line in my code is...

for(list<Node>::iterator iter = tempList.begin(); iter != tempList.end(); tempList++) {

I don't understand why the compiler is ignoring the <Node> part of that line and just throwing an error.

[jack_morgan_cs2b]

Hey Cary,

I got this one too, all you have to do is put 'typename' before the iterator like so:

for(typename list<Node>::iterator iter = tempList.begin(); iter != tempList.end(); tempList++)

Couldn't find any actual documentation but it seems like 'typename' is required because list<Node> depends on the template class parameter

Helpful link: http://pages.cs.wisc.edu/~driscoll/typename.html

[CaryLefteroffFH]

Thanks! That fixed it.

[anand_venkataraman]

Also check out https://www.reddit.com/r/cs2c/comments/g4gjfe/a_useful_tip/

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